Rapidly changing search behaviors and the need of business giants to target and remarket the customers of different demographics; has raised the need to know the demographics of their customers and to fulfill the need the most personal behavior and information are stored carefully in the database:
1. Your thoughts
5. Shopping habits.
And based of these activities and data profiles highly targeted advertisements are shown and the users are remarketed by different remarketing channels like Google and other networks remarketing tools.
If you want to secure your search queries and behaviors you can simply Turn Off and delete your history and according to policy this will prohibit and strict search engines to not to store and use your data.
* At Google go to https://www.google.com/history and make the required changes.
* At Bings go to http://www.bing.com/profile/history and make the required changes.